Oil seal one-way valve structure for shock absorber

Abstract

The utility model discloses an oil seal one-way valve structure for a shock absorber, and relates to the field of automobile shock absorbers, the oil seal one-way valve structure comprises an inner cylinder and an outer cylinder which are arranged in a shock absorber main body, a working cavity is formed in the inner cylinder, an air inflation cavity is formed between the inner cylinder and the outer cylinder, a guider is arranged on the shock absorber main body, an oil seal is arranged on the guider, and the air inflation cavity is communicated with the working cavity. The oil seal is provided with a one-way valve, the one-way valve is arranged between the working cavity and the inflation cavity, and the one-way valve is used for transferring gas in the working cavity into the inflation cavity and guaranteeing that the gas in the inflation cavity cannot flow back into the working cavity. According to the shock absorber, through the arrangement of the one-way valve, gas in the working cavity can be transferred into the inflation cavity, it is guaranteed that gas in the inflation cavity cannot flow back into the working cavity, and it is effectively avoided that too much gas exists in the working cavity, and the performance of the shock absorber is affected.

Description

Technical Field

[0001] The present application relates to the field of automobile shock absorbers, and in particular to an oil seal one-way valve structure for shock absorbers. Background Art

[0002] As a key component of the automobile shock absorber system, the sealing performance of the shock absorber oil seal is the primary condition to ensure the normal function of the shock absorber.

[0003] During the movement of the shock absorber, in order to generate damping force, a large pressure difference will be generated at both ends of the valve system, and the pressure difference will cause cavitation effect, thereby generating some gas. Excessive gas in the inner tube of the shock absorber will affect the performance of the shock absorber.

[0004] Therefore, a one-way valve structure is needed which can transfer gas from the working chamber of the inner cylinder to the working chamber between the inner and outer cylinders and prevent air from flowing back into the working chamber of the inner cylinder. Utility Model Content

[0005] In order to improve the transfer of gas from the working chamber of the inner cylinder to the working chamber between the inner and outer cylinders and prevent air from flowing back into the working chamber of the inner cylinder, while ensuring a smaller opening pressure and a larger locking pressure, the present application provides an oil seal one-way valve structure for a shock absorber.

[0006] The present application provides an oil seal one-way valve structure for a shock absorber, which adopts the following technical solution:

[0007] A shock absorber oil seal one-way valve structure comprises an inner cylinder and an outer cylinder arranged in a shock absorber body, a working chamber is formed in the inner cylinder, an inflation chamber is formed between the inner cylinder and the outer cylinder, a guide is arranged on the shock absorber body, an oil seal is arranged on the guide, a one-way valve is arranged on the oil seal, the one-way valve is arranged between the working chamber and the inflation chamber, and the one-way valve is used to transfer the gas in the working chamber to the inflation chamber and ensure that the gas in the inflation chamber does not flow back into the working chamber.

[0008] By adopting the above technical solution and utilizing the one-way valve, the gas in the working chamber can be transferred to the inflation chamber and the gas in the inflation chamber will not flow back into the working chamber, thereby effectively avoiding the presence of excessive gas in the working chamber that would affect the performance of the shock absorber.

[0009] Preferably, a sealing surface is formed on one side of the guide that abuts against the sealing lip of the one-way valve, and an interference fit is formed between the sealing lip of the one-way valve and the sealing surface.

[0010] By adopting the above technical solution, the sealing performance between the guide and the one-way valve is effectively improved, and the inflation cavity is sealed.

[0011] Preferably, a certain angle is formed between the sealing lip and the sealing surface of the one-way valve, and the angle is no greater than thirty degrees.

[0012] By adopting the above technical solution, the angle between the sealing lip and the sealing surface of the one-way valve is small, so that when the gas enters the inflation chamber from the working chamber, the opening pressure of the one-way valve is very small, thereby allowing the gas to pass smoothly. On the contrary, on the inflation chamber side, the locking pressure of the one-way valve is very large.

[0013] Preferably, an oil tank is provided in the guide, shock absorber oil is placed in the oil tank, and the sealing lip of the one-way valve is immersed in the oil in the oil tank.

[0014] By adopting the above technical solution, the sealing performance between the guide and the one-way valve is further improved, and the inflation cavity is sealed.

[0015] Preferably, the oil seal is made of rubber.

[0016] Preferably, a rebound structure is provided between the side of the sealing lip of the one-way valve facing away from the sealing surface and the oil seal, and the rebound structure is used to reset the sealing lip and seal the inflation chamber after the gas enters the inflation chamber from the working chamber.

[0017] By adopting the above technical solution, the inflation cavity can be quickly sealed after the air circulation is completed, thereby further improving the sealing performance of the device.

[0018] Preferably, the rebound structure includes a spring arranged between the oil seal and the sealing lip of the one-way valve.

[0019] By adopting the above technical solution, after the gas enters the inflation chamber from the working chamber, the spring is used to realize the rapid rebound of the one-way valve, thereby realizing the rapid sealing of the inflation chamber.

[0020] Preferably, the spring is in a compressed state after the one-way valve opens toward the inflation chamber, and the spring is in a freely extended state after the one-way valve is reset.

[0021] By adopting the above technical solution, when the spring is in a freely extended state, no additional force will be applied to the one-way valve, thereby not affecting the normal opening of the one-way valve toward the inflation chamber, and the opening pressure is still very small. When the one-way valve is to be opened toward the working chamber, the spring will give the one-way valve a pulling force, further increasing the locking pressure of the one-way valve.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. By using the one-way valve, the gas in the working chamber can be transferred to the inflation chamber and the gas in the inflation chamber will not flow back into the working chamber, which effectively avoids the presence of excessive gas in the working chamber, which will affect the performance of the shock absorber;

[0024] 2. With the interference fit between the sealing lip and the sealing surface of the one-way valve, and the small angle between the sealing lip and the sealing surface, the one-way valve can open with very little pressure when the gas enters the inflation chamber from the working chamber, so that the gas can pass smoothly. On the contrary, on the inflation chamber side, the locking pressure of the one-way valve is very large;

[0025] 3. With the help of an oil tank provided in the shock absorber body, shock absorber oil is placed in the oil tank, and the sealing lip of the one-way valve is immersed in the oil in the oil tank, the sealing performance between the guide and the one-way valve is further improved, and the inflation chamber is sealed;

[0026] 4. With the help of the spring setting, after the gas enters the inflation chamber from the working chamber, the spring is used to realize the rapid rebound of the one-way valve and the rapid sealing of the inflation chamber. At the same time, the spring is in a compressed state after the one-way valve opens toward the inflation chamber, and the spring is in a free extension state after the one-way valve is reset. When the spring is in a free extension state, no additional force will be applied to the one-way valve, so it will not affect the normal opening of the one-way valve toward the inflation chamber, and the opening pressure is still very small. When the one-way valve is to be opened toward the working chamber, the spring will give the one-way valve a pulling force, further increasing the locking pressure of the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram mainly showing the overall structure of the oil seal one-way valve in this embodiment.

[0028] Figure numerals: 1, working chamber; 2, inflation chamber; 3, guide; 4, oil seal; 5, one-way valve; 6, sealing surface; 7, oil groove; 8, rebound structure; 81, spring. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] The embodiment of the present application discloses an oil seal one-way valve structure for a shock absorber.

[0031] Reference Figure 1 The oil seal one-way valve structure for the shock absorber includes an inner cylinder and an outer cylinder arranged in the shock absorber body, a working chamber 1 is formed in the inner cylinder, and an inflation chamber 2 is formed between the inner cylinder and the outer cylinder. A guide 3 is arranged on the shock absorber body, an oil seal 4 is arranged on the guide 3, a one-way valve 5 is arranged on the oil seal 4, and the one-way valve 5 is arranged between the working chamber 1 and the inflation chamber 2. The one-way valve 5 is used to transfer the gas in the working chamber 1 to the inflation chamber 2 and ensure that the gas in the inflation chamber 2 does not flow back into the working chamber 1.

[0032] Specifically, in order to generate damping force during the operation of the shock absorber, a large pressure difference will be generated at both ends of the valve system, and the pressure difference will cause cavitation effect, thereby generating part of the gas concentrated in the working chamber 1. In order to ensure the performance and reliability of the shock absorber, this part of the gas needs to be transferred to the inflation chamber 2, and it must be ensured that it will not flow back from the inflation chamber 2 to the working chamber 1. Therefore, in this embodiment, the side where the guide 3 abuts against the sealing lip of the one-way valve 5 forms a sealing surface 6, and the sealing lip of the one-way valve 5 and the sealing surface 6 have an interference fit. A certain angle is formed between the sealing lip of the one-way valve 5 and the sealing surface 6, and the angle is not greater than thirty degrees. By using the setting of the one-way valve 5, the gas in the working chamber 1 can be transferred to the inflation chamber 2 and the gas in the inflation chamber 2 will not flow back into the working chamber 1, effectively avoiding the existence of excessive gas in the working chamber 1, which will affect the performance of the shock absorber.

[0033] At the same time, the interference fit between the sealing lip of the one-way valve 5 and the sealing surface 6 can effectively improve the sealing performance between the guide 3 and the one-way valve 5, and seal the inflation chamber 2. In addition, the angle between the sealing lip of the one-way valve 5 and the sealing surface 6 is small, so that when the gas enters the inflation chamber 2 from the working chamber 1, the opening pressure of the one-way valve 5 is very small, so that the gas passes smoothly. On the contrary, on the inflation chamber side, the locking pressure of the one-way valve 5 is very large.

[0034] It should also be noted that an oil tank 7 is provided in the guide 3, and shock absorber oil is placed in the oil tank 7, and the sealing lip of the one-way valve 5 is immersed in the oil in the oil tank 7. The oil and the one-way valve 5 cooperate with each other to further improve the sealing between the guide 3 and the one-way valve 5, and seal the inflation chamber 2.

[0035] In other embodiments, the oil seal 4 is made of rubber.

[0036] Reference Figure 1 A rebound structure is arranged between the side of the sealing lip of the one-way valve 5 facing away from the sealing surface 6 and the oil seal 4. The rebound structure 8 is used to reset the sealing lip and seal the inflation chamber 2 after the gas enters the inflation chamber 2 from the working chamber 1.

[0037] Specifically, the rebound structure 8 includes a spring 81 disposed between the oil seal 4 and the sealing lip of the one-way valve 5. The spring 81 is in a compressed state after the one-way valve 5 is opened toward the inflation chamber, and the spring 81 is in a freely extended state after the one-way valve 5 is reset. When the spring 81 is in a freely extended state, no additional force is applied to the one-way valve 5, so the normal opening of the one-way valve 5 toward the inflation chamber 2 is not affected, and the opening pressure is still small. When the one-way valve 5 is to be opened toward the working chamber 1, the spring 81 will give the one-way valve a pulling force, further increasing the locking pressure of the one-way valve 5.

[0038] The implementation principle of an oil seal one-way valve structure for a shock absorber in an embodiment of the present application is as follows: the angle between the sealing lip and the sealing surface 6 of the one-way valve 5 is small, so that when the gas enters the inflation chamber 2 from the working chamber 1, the opening pressure of the one-way valve 5 is very small, thereby allowing the gas to pass smoothly. On the contrary, on the inflation chamber 2 side, the locking pressure of the one-way valve 5 is very large; and when the spring 81 is in a freely extended state, no additional force will be applied to the one-way valve 5, thereby not affecting the normal opening of the one-way valve 5 toward the inflation chamber 2, and the opening pressure is still very small. When the one-way valve 5 is to be opened toward the working chamber 1, the spring will give a pulling force to the one-way valve 5, further increasing the locking pressure of the one-way valve 5.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An oil seal check valve structure for a shock absorber, comprising an inner cylinder and an outer cylinder arranged in a shock absorber body, wherein a working chamber (1) is formed in the inner cylinder, and an air filling chamber (2) is formed between the inner cylinder and the outer cylinder, characterized in that: A guide (3) is provided on the shock absorber body, an oil seal (4) is provided on the guide (3), a one-way valve (5) is provided on the oil seal (4), the one-way valve (5) is provided between the working chamber (1) and the inflation chamber (2), and the one-way valve (5) is used to transfer the gas in the working chamber (1) to the inflation chamber (2) and ensure that the gas in the inflation chamber (2) does not flow back into the working chamber (1).

2. The oil seal check valve structure for a shock absorber according to claim 1, characterized in that: The side of the guide (3) abutting against the sealing lip of the one-way valve (5) forms a sealing surface (6), and the sealing lip of the one-way valve (5) and the sealing surface (6) are interference-fitted.

3. The oil seal check valve structure for a shock absorber according to claim 2, characterized in that: A certain angle is formed between the sealing lip of the one-way valve (5) and the sealing surface (6), and the angle is no greater than thirty degrees.

4. The oil seal check valve structure for a shock absorber according to claim 2, characterized in that: An oil groove (7) is provided in the guide (3), shock absorber oil is placed in the oil groove (7), and the sealing lip of the one-way valve (5) is immersed in the oil in the oil groove.

5. The oil seal check valve structure for a shock absorber according to claim 1, characterized in that: The oil seal (4) is made of rubber material.

6. The oil seal check valve structure for a shock absorber according to claim 3, characterized in that: A rebound structure is provided between the side of the sealing lip of the one-way valve (5) facing away from the sealing surface (6) and the oil seal (4), and the rebound structure (8) is used to reset the sealing lip and seal the inflation chamber (2) after gas enters the inflation chamber (2) from the working chamber (1).

7. The oil seal check valve structure for a shock absorber according to claim 6, characterized in that: The rebound structure (8) comprises a spring (81) arranged between the oil seal (4) and the sealing lip of the one-way valve (5).

8. The oil seal check valve structure for a shock absorber according to claim 7, characterized in that: The spring (81) is in a compressed state after the one-way valve (5) opens toward the inflation chamber, and the spring (81) is in a freely extended state after the one-way valve (5) is reset.

Images